Mercurial > sdl-ios-xcode
annotate src/joystick/win32/SDL_mmjoystick.c @ 1288:ea3888b472bf
Cleaned up the app registration stuff a bit
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 29 Jan 2006 09:13:36 +0000 |
| parents | cf6133247d34 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */ | |
| 29 | |
| 30 #include <stdlib.h> | |
| 31 #include <stdio.h> /* For the definition of NULL */ | |
| 32 | |
| 33 #include "SDL_error.h" | |
| 34 #include "SDL_joystick.h" | |
| 35 #include "SDL_sysjoystick.h" | |
| 36 #include "SDL_joystick_c.h" | |
| 37 | |
| 38 #include <windows.h> | |
| 39 #include <mmsystem.h> | |
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40 #include <regstr.h> |
| 0 | 41 |
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42 #define MAX_JOYSTICKS 16 |
| 0 | 43 #define MAX_AXES 6 /* each joystick can have up to 6 axes */ |
| 44 #define MAX_BUTTONS 32 /* and 32 buttons */ | |
| 45 #define AXIS_MIN -32768 /* minimum value for axis coordinate */ | |
| 46 #define AXIS_MAX 32767 /* maximum value for axis coordinate */ | |
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47 /* limit axis to 256 possible positions to filter out noise */ |
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48 #define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) |
| 0 | 49 #define JOY_BUTTON_FLAG(n) (1<<n) |
| 50 | |
| 51 | |
| 52 /* array to hold joystick ID values */ | |
| 53 static UINT SYS_JoystickID[MAX_JOYSTICKS]; | |
| 54 static JOYCAPS SYS_Joystick[MAX_JOYSTICKS]; | |
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55 static char *SYS_JoystickName[MAX_JOYSTICKS]; |
| 0 | 56 |
| 57 /* The private structure used to keep track of a joystick */ | |
| 58 struct joystick_hwdata | |
| 59 { | |
| 60 /* joystick ID */ | |
| 61 UINT id; | |
| 62 | |
| 63 /* values used to translate device-specific coordinates into | |
| 64 SDL-standard ranges */ | |
| 65 struct _transaxis { | |
| 66 int offset; | |
| 67 float scale; | |
| 68 } transaxis[6]; | |
| 69 }; | |
| 70 | |
| 71 /* Convert a win32 Multimedia API return code to a text message */ | |
| 72 static void SetMMerror(char *function, int code); | |
| 73 | |
| 74 | |
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75 static char *GetJoystickName(int index, const char *szRegKey) |
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76 { |
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77 /* added 7/24/2004 by Eckhard Stolberg */ |
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78 /* |
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79 see if there is a joystick for the current |
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80 index (1-16) listed in the registry |
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81 */ |
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82 char *name = NULL; |
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83 HKEY hKey; |
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84 DWORD regsize; |
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85 LONG regresult; |
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86 unsigned char regkey[256]; |
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87 unsigned char regvalue[256]; |
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88 unsigned char regname[256]; |
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89 |
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90 sprintf((char *) regkey, "%s\\%s\\%s", |
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91 REGSTR_PATH_JOYCONFIG, |
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92 szRegKey, |
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93 REGSTR_KEY_JOYCURR); |
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94 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE, |
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95 (LPTSTR) ®key, 0, KEY_READ, &hKey); |
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96 if (regresult == ERROR_SUCCESS) |
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97 { |
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98 /* |
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99 find the registry key name for the |
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100 joystick's properties |
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101 */ |
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102 regsize = sizeof(regname); |
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103 sprintf((char *) regvalue, |
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104 "Joystick%d%s", index+1, |
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105 REGSTR_VAL_JOYOEMNAME); |
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106 regresult = RegQueryValueExA(hKey, |
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107 (char *) regvalue, 0, 0, (LPBYTE) ®name, |
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108 (LPDWORD) ®size); |
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109 RegCloseKey(hKey); |
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110 if (regresult == ERROR_SUCCESS) |
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111 { |
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112 /* open that registry key */ |
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113 sprintf((char *) regkey, "%s\\%s", |
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114 REGSTR_PATH_JOYOEM, regname); |
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115 regresult = RegOpenKeyExA(HKEY_LOCAL_MACHINE, |
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116 (char *) regkey, 0, KEY_READ, &hKey); |
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117 if (regresult == ERROR_SUCCESS) |
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118 { |
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119 /* find the size for the OEM name text */ |
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120 regsize = sizeof(regvalue); |
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121 regresult = |
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122 RegQueryValueExA(hKey, |
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123 REGSTR_VAL_JOYOEMNAME, |
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124 0, 0, NULL, |
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125 (LPDWORD) ®size); |
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126 if (regresult == ERROR_SUCCESS) |
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127 { |
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128 /* |
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129 allocate enough memory |
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130 for the OEM name text ... |
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131 */ |
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132 name = (char *) malloc(regsize); |
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133 /* ... and read it from the registry */ |
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134 regresult = |
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135 RegQueryValueExA(hKey, |
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136 REGSTR_VAL_JOYOEMNAME, 0, 0, |
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137 (LPBYTE) name, |
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138 (LPDWORD) ®size); |
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139 RegCloseKey(hKey); |
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140 } |
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141 } |
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142 } |
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143 } |
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144 return(name); |
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145 } |
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146 |
| 0 | 147 /* Function to scan the system for joysticks. |
| 148 * This function should set SDL_numjoysticks to the number of available | |
| 149 * joysticks. Joystick 0 should be the system default joystick. | |
| 150 * It should return 0, or -1 on an unrecoverable fatal error. | |
| 151 */ | |
| 152 int SDL_SYS_JoystickInit(void) | |
| 153 { | |
| 154 int i; | |
| 155 int maxdevs; | |
| 156 int numdevs; | |
| 157 JOYINFOEX joyinfo; | |
| 158 JOYCAPS joycaps; | |
| 159 MMRESULT result; | |
| 160 | |
| 161 numdevs = 0; | |
| 162 maxdevs = joyGetNumDevs(); | |
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163 |
| 0 | 164 if ( maxdevs > MAX_JOYSTICKS ) { |
| 165 maxdevs = MAX_JOYSTICKS; | |
| 166 } | |
| 167 | |
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168 |
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169 for ( i = 0; i < MAX_JOYSTICKS; i++ ) { |
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170 SYS_JoystickID[i] = JOYSTICKID1 + i; |
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171 SYS_JoystickName[i] = NULL; |
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172 } |
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173 |
| 0 | 174 |
| 175 for ( i = 0; (i < maxdevs); ++i ) { | |
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176 |
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177 /* added 8/31/2001 By Vitaliy Mikitchenko */ |
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178 joyinfo.dwSize = sizeof(joyinfo); |
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179 joyinfo.dwFlags = JOY_RETURNALL; |
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180 /* end addition */ |
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181 |
| 0 | 182 result = joyGetPosEx(SYS_JoystickID[i], &joyinfo); |
| 183 if ( result == JOYERR_NOERROR ) { | |
| 184 result = joyGetDevCaps(SYS_JoystickID[i], &joycaps, sizeof(joycaps)); | |
| 185 if ( result == JOYERR_NOERROR ) { | |
| 186 SYS_JoystickID[numdevs] = SYS_JoystickID[i]; | |
| 187 SYS_Joystick[numdevs] = joycaps; | |
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188 SYS_JoystickName[numdevs] = GetJoystickName(numdevs, joycaps.szRegKey); |
| 0 | 189 numdevs++; |
| 190 } | |
| 191 } | |
| 192 } | |
| 193 return(numdevs); | |
| 194 } | |
| 195 | |
| 196 /* Function to get the device-dependent name of a joystick */ | |
| 197 const char *SDL_SYS_JoystickName(int index) | |
| 198 { | |
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199 if ( SYS_JoystickName[index] != NULL ) { |
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200 return(SYS_JoystickName[index]); |
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201 } else { |
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202 return(SYS_Joystick[index].szPname); |
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203 } |
| 0 | 204 } |
| 205 | |
| 206 /* Function to open a joystick for use. | |
| 207 The joystick to open is specified by the index field of the joystick. | |
| 208 This should fill the nbuttons and naxes fields of the joystick structure. | |
| 209 It returns 0, or -1 if there is an error. | |
| 210 */ | |
| 211 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) | |
| 212 { | |
| 213 int index, i; | |
| 214 int caps_flags[MAX_AXES-2] = | |
| 215 { JOYCAPS_HASZ, JOYCAPS_HASR, JOYCAPS_HASU, JOYCAPS_HASV }; | |
| 216 int axis_min[MAX_AXES], axis_max[MAX_AXES]; | |
| 217 | |
| 218 | |
| 219 /* shortcut */ | |
| 220 index = joystick->index; | |
| 221 axis_min[0] = SYS_Joystick[index].wXmin; | |
| 222 axis_max[0] = SYS_Joystick[index].wXmax; | |
| 223 axis_min[1] = SYS_Joystick[index].wYmin; | |
| 224 axis_max[1] = SYS_Joystick[index].wYmax; | |
| 225 axis_min[2] = SYS_Joystick[index].wZmin; | |
| 226 axis_max[2] = SYS_Joystick[index].wZmax; | |
| 227 axis_min[3] = SYS_Joystick[index].wRmin; | |
| 228 axis_max[3] = SYS_Joystick[index].wRmax; | |
| 229 axis_min[4] = SYS_Joystick[index].wUmin; | |
| 230 axis_max[4] = SYS_Joystick[index].wUmax; | |
| 231 axis_min[5] = SYS_Joystick[index].wVmin; | |
| 232 axis_max[5] = SYS_Joystick[index].wVmax; | |
| 233 | |
| 234 /* allocate memory for system specific hardware data */ | |
| 235 joystick->hwdata = (struct joystick_hwdata *) malloc(sizeof(*joystick->hwdata)); | |
| 236 if (joystick->hwdata == NULL) | |
| 237 { | |
| 238 SDL_OutOfMemory(); | |
| 239 return(-1); | |
| 240 } | |
| 241 memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); | |
| 242 | |
| 243 /* set hardware data */ | |
| 244 joystick->hwdata->id = SYS_JoystickID[index]; | |
| 245 for ( i = 0; i < MAX_AXES; ++i ) { | |
| 246 if ( (i<2) || (SYS_Joystick[index].wCaps & caps_flags[i-2]) ) { | |
| 247 joystick->hwdata->transaxis[i].offset = | |
| 248 AXIS_MIN - axis_min[i]; | |
| 249 joystick->hwdata->transaxis[i].scale = | |
| 250 (float)(AXIS_MAX - AXIS_MIN) / (axis_max[i] - axis_min[i]); | |
| 251 } else { | |
| 252 joystick->hwdata->transaxis[i].offset = 0; | |
| 253 joystick->hwdata->transaxis[i].scale = 1.0; /* Just in case */ | |
| 254 } | |
| 255 } | |
| 256 | |
| 257 /* fill nbuttons, naxes, and nhats fields */ | |
| 258 joystick->nbuttons = SYS_Joystick[index].wNumButtons; | |
| 259 joystick->naxes = SYS_Joystick[index].wNumAxes; | |
| 260 if ( SYS_Joystick[index].wCaps & JOYCAPS_HASPOV ) { | |
| 261 joystick->nhats = 1; | |
| 262 } else { | |
| 263 joystick->nhats = 0; | |
| 264 } | |
| 265 return(0); | |
| 266 } | |
| 267 | |
| 268 static Uint8 TranslatePOV(DWORD value) | |
| 269 { | |
| 270 Uint8 pos; | |
| 271 | |
| 272 pos = SDL_HAT_CENTERED; | |
| 273 if ( value != JOY_POVCENTERED ) { | |
| 274 if ( (value > JOY_POVLEFT) || (value < JOY_POVRIGHT) ) { | |
| 275 pos |= SDL_HAT_UP; | |
| 276 } | |
| 277 if ( (value > JOY_POVFORWARD) && (value < JOY_POVBACKWARD) ) { | |
| 278 pos |= SDL_HAT_RIGHT; | |
| 279 } | |
| 280 if ( (value > JOY_POVRIGHT) && (value < JOY_POVLEFT) ) { | |
| 281 pos |= SDL_HAT_DOWN; | |
| 282 } | |
| 283 if ( value > JOY_POVBACKWARD ) { | |
| 284 pos |= SDL_HAT_LEFT; | |
| 285 } | |
| 286 } | |
| 287 return(pos); | |
| 288 } | |
| 289 | |
| 290 /* Function to update the state of a joystick - called as a device poll. | |
| 291 * This function shouldn't update the joystick structure directly, | |
| 292 * but instead should call SDL_PrivateJoystick*() to deliver events | |
| 293 * and update joystick device state. | |
| 294 */ | |
| 295 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) | |
| 296 { | |
| 297 MMRESULT result; | |
| 298 int i; | |
| 299 DWORD flags[MAX_AXES] = { JOY_RETURNX, JOY_RETURNY, JOY_RETURNZ, | |
| 300 JOY_RETURNR, JOY_RETURNU, JOY_RETURNV }; | |
| 301 DWORD pos[MAX_AXES]; | |
| 302 struct _transaxis *transaxis; | |
| 303 int value, change; | |
| 304 JOYINFOEX joyinfo; | |
| 305 | |
| 306 joyinfo.dwSize = sizeof(joyinfo); | |
| 307 joyinfo.dwFlags = JOY_RETURNALL|JOY_RETURNPOVCTS; | |
| 308 if ( ! joystick->hats ) { | |
| 309 joyinfo.dwFlags &= ~(JOY_RETURNPOV|JOY_RETURNPOVCTS); | |
| 310 } | |
| 311 result = joyGetPosEx(joystick->hwdata->id, &joyinfo); | |
| 312 if ( result != JOYERR_NOERROR ) { | |
| 313 SetMMerror("joyGetPosEx", result); | |
| 314 return; | |
| 315 } | |
| 316 | |
| 317 /* joystick motion events */ | |
| 318 pos[0] = joyinfo.dwXpos; | |
| 319 pos[1] = joyinfo.dwYpos; | |
| 320 pos[2] = joyinfo.dwZpos; | |
| 321 pos[3] = joyinfo.dwRpos; | |
| 322 pos[4] = joyinfo.dwUpos; | |
| 323 pos[5] = joyinfo.dwVpos; | |
| 324 | |
| 325 transaxis = joystick->hwdata->transaxis; | |
| 326 for (i = 0; i < joystick->naxes; i++) { | |
| 327 if (joyinfo.dwFlags & flags[i]) { | |
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328 value = (int)(((float)pos[i] + transaxis[i].offset) * transaxis[i].scale); |
| 0 | 329 change = (value - joystick->axes[i]); |
| 330 if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) { | |
| 331 SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value); | |
| 332 } | |
| 333 } | |
| 334 } | |
| 335 | |
| 336 /* joystick button events */ | |
| 337 if ( joyinfo.dwFlags & JOY_RETURNBUTTONS ) { | |
| 338 for ( i = 0; i < joystick->nbuttons; ++i ) { | |
| 339 if ( joyinfo.dwButtons & JOY_BUTTON_FLAG(i) ) { | |
| 340 if ( ! joystick->buttons[i] ) { | |
| 341 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_PRESSED); | |
| 342 } | |
| 343 } else { | |
| 344 if ( joystick->buttons[i] ) { | |
| 345 SDL_PrivateJoystickButton(joystick, (Uint8)i, SDL_RELEASED); | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 } | |
| 350 | |
| 351 /* joystick hat events */ | |
| 352 if ( joyinfo.dwFlags & JOY_RETURNPOV ) { | |
| 353 Uint8 pos; | |
| 354 | |
| 355 pos = TranslatePOV(joyinfo.dwPOV); | |
| 356 if ( pos != joystick->hats[0] ) { | |
| 357 SDL_PrivateJoystickHat(joystick, 0, pos); | |
| 358 } | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 /* Function to close a joystick after use */ | |
| 363 void SDL_SYS_JoystickClose(SDL_Joystick *joystick) | |
| 364 { | |
| 365 if (joystick->hwdata != NULL) { | |
| 366 /* free system specific hardware data */ | |
| 367 free(joystick->hwdata); | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 /* Function to perform any system-specific joystick related cleanup */ | |
| 372 void SDL_SYS_JoystickQuit(void) | |
| 373 { | |
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374 int i; |
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375 for (i = 0; i < MAX_JOYSTICKS; i++) { |
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376 if ( SYS_JoystickName[i] != NULL ) { |
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377 free(SYS_JoystickName[i]); |
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378 } |
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379 } |
| 0 | 380 } |
| 381 | |
| 382 | |
| 383 /* implementation functions */ | |
| 384 void SetMMerror(char *function, int code) | |
| 385 { | |
| 386 static char *error; | |
| 387 static char errbuf[BUFSIZ]; | |
| 388 | |
| 389 errbuf[0] = 0; | |
| 390 switch (code) | |
| 391 { | |
| 392 case MMSYSERR_NODRIVER: | |
| 393 error = "Joystick driver not present"; | |
| 394 break; | |
| 395 | |
| 396 case MMSYSERR_INVALPARAM: | |
| 397 case JOYERR_PARMS: | |
| 398 error = "Invalid parameter(s)"; | |
| 399 break; | |
| 400 | |
| 401 case MMSYSERR_BADDEVICEID: | |
| 402 error = "Bad device ID"; | |
| 403 break; | |
| 404 | |
| 405 case JOYERR_UNPLUGGED: | |
| 406 error = "Joystick not attached"; | |
| 407 break; | |
| 408 | |
| 409 case JOYERR_NOCANDO: | |
| 410 error = "Can't capture joystick input"; | |
| 411 break; | |
| 412 | |
| 413 default: | |
| 414 sprintf(errbuf, "%s: Unknown Multimedia system error: 0x%x", | |
| 415 function, code); | |
| 416 break; | |
| 417 } | |
| 418 | |
| 419 if ( ! errbuf[0] ) { | |
| 420 sprintf(errbuf, "%s: %s", function, error); | |
| 421 } | |
| 422 SDL_SetError("%s", errbuf); | |
| 423 } |